Novel device and method for testing minimum bend radius of ocean engineering flexibility pipeline and cable

Abstract

The invention discloses a novel device for testing minimum bend radius of ocean engineering flexibility pipeline and cable. The device includes an anvil block, a horizontal slide rail, a tooth bar on the horizontal slide rail, an actuator for pushing the tooth bar to move along the horizontal slide rail, a pinion which coordinates with the tooth bar, a bull gear which coordinates with the pinion, a gear fixing rack for fixing the bull gear and the pinion, and a rope, wherein the anvil block includes an arc plate, a pipeline and cable bending support plate for fixing the arc plate, and a support truss structure. The invention also discloses a novel method for testing minimum bend radius of ocean engineering flexibility pipeline and cable. The novel device and method for testing minimum bend radius of ocean engineering flexibility pipeline and cable can realize that a greater radius of curvature of the pipeline and cable gradually and continuously transits to a smaller radius until the armoured steel wire for the pipeline and cable achieves the yielding state during the loading process, so that the novel device and method can guarantee that the minimum bend radius of the pipeline and cable can be accurately obtained through the test.

Description

technical field [0001] The invention relates to a testing device and method, in particular to a novel testing device and method for the minimum bending radius of flexible umbilical cables in marine engineering. Background technique [0002] my country's offshore oil and gas reserves are abundant, and most of them are distributed in deep waters such as the South China Sea. Submarine cables, umbilical cables and flexible pipelines are one of the indispensable equipment in deep sea oil and gas exploitation. Such equipment can be collectively referred to as marine flexible umbilicals, and its structure is usually composed of corresponding functional components and strengthening components such as armored steel wires. According to different engineering requirements, pipe cables with corresponding functions should be selected; submarine cables are mainly responsible for providing electrical energy for subsea oil production equipment, umbilical cables are mainly responsible for po...

AI Technical Summary

Problems solved by technology

[0013] 1. The minimum bending radius of the umbilical cable that can be measured by the anvil has the disadvantage of jumping in a small range, which is only suitable for the measurement of the minimum bending radius of some umbilical cables, and the measurement results are not accurate;

[0014] 2. Depending on the loading method of the chain hoist, manual force can only be applied intermittently; therefore, the loading speed cannot be well controlled

At the same time, due to the structural characteristics of the chain block, there will be a certain rebound after each force is applied, which brings great inconvenience to the later data processing;

[0015] 3. Since the joints at both ends of the pipe cable are fixed by chain traction, a certain range of swings will occur during the loading process, and the stability is poor, which increases the error of the experiment;

[0016] 4. The entire test operation requires the cooperation of multiple people to complete, which is time-consuming and laborious;

[0017] 5. Since the pipe cable test piece needs to span the entire anvil, a long test piece is required to facilitate loading and operation, resulting in waste of experimental samples

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